A modification of ockhams Eureka python script might do the job.

Eureka is a script that does something related to this problem: whenever a character sits on a soft surface, like a cushion, this soft surface should deform. Eureka will calculate how the vertices should move, including pushing vertices aside.

You could even use the script "as is" by rotating the figure and the bench upside down and sort of "have the bench sit on the characters buttocks." The script can use the bench as the hard object and the buttocks as soft objects.

The result of the script is a morph target dial.

I've been fiddling with the idea of expanding on the script, making it possible to use other movements than just vertical, and adding a graphical user interface to pick hard and soft actors. There's quite a bit of math involved, and I haven't had the time yet.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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